Quality Assurance SDET Engineer

oneZero Financial Systems•Somerville, MA

2d•Onsite

About The Position

oneZero Financial Systems is hiring a Quality Assurance SDET Engineer for its Somerville office. The role focuses on end-user experience and ensuring that complex product features and business workflows work reliably and intuitively in real-world use. The SDET supports quality throughout agentic AI-assisted code delivery by helping define requirements, user personas, workflows, tests, and guardrails, then independently validating behavior, compatibility, usability, and performance before release. The position works across the testing pyramid, improves application testability, and partners with engineering and product teams to identify risks early and deliver high-quality experiences. The role combines financial-domain knowledge with technical skills in test automation, AI-assisted development, and testing frameworks. It involves creating and reviewing automation, maintaining tests in CI/CD, developing performance and end-to-end GUI tests, contributing to test framework improvements, and supporting production troubleshooting. The SDET also participates in agile teams and works with developers on parallel development and testing. The salary range is $95,000 to $122,000, depending on relevant experience.

Requirements

Bachelor’s degree in a science field; Computer Science, Math, Engineering, or MIS preferred.
3–6 years of software development or automation development experience.
Experience with AI, CI/CD, BDD/TDD, C#, relational databases, performance tools, and Python or JavaScript.
3–6 years of finance-industry experience.
Intellectual curiosity and demonstrated ability to learn on the fly.
Ability to understand complex financial instruments, business rules, and user workflows.
Ability to write automated tests, participate in code reviews, and work across multiple levels of the testing pyramid.

Nice To Haves

Finance-industry experience in FX, crypto, commodities, or algorithmic trading.
Experience with REST/API, GUI, performance, ETL/big data, and custom test solutions.

Responsibilities

Combine business finance subject matter expertise with technical skills to support quality and best practices.
Create user-centric feature context to support complete and accurate test plans.
Understand complex financial instruments, business rules, user workflows, and the application under test.
Apply knowledge of the testing pyramid and ensure stories and epics meet Definition of Ready and Definition of Done.
Identify automation framework updates needed to support new feature tests.
Apply AI-first and automation-first BDD and TDD practices.
Use AI prompts, agents, and skills to create high-quality code and tools; support code repositories for common agentic automation solutions.
Design, create, and review automation that validates intended functionality; write automated tests, participate in code reviews, and identify and fix issues in AI agents and code.
Work across all levels of the test pyramid and incorporate automated tests into CI/CD pipelines; monitor and maintain tests.
Investigate and resolve acceptance-test and test-case discrepancies in a timely manner.
Use performance automation tools to create performance test scripts.
Automate and validate end-to-end GUI-based system workflows and proactively refactor test automation.
Participate in squad or scrum teams and collaborate with developers on parallel development and testing.
Estimate stories and personal capacity accurately.
Identify inefficiencies, communicate them, and drive improvement using Kaizen principles.
Build and extend business-domain expertise through purposeful study; understand the purpose and context of user workflows and advocate for the customer experience.
Understand test-framework architecture and tooling, including AI-agent infrastructure, and contribute to framework improvements.
Work with REST/API, GUI, performance, ETL/big data, and custom test frameworks or solutions.
Understand production support models and how production environments are deployed and configured; contribute to production troubleshooting and use-case replication with supervision.